реши уравнения. b- (75-38)=27/ (60-11)+c=90/

Question

реши уравнения. b- (75-38)=27/ (60-11)+c=90/

Answer 1

B-(75-38)=27                            (60-11)+c=90
b=27+(75-38)                           c=90-(60-11)
b=27+37                                  c=90-49
b=64                                       c=41
Проверка                                Проверка
64-(75-38)=27                          (60-11)+41=90

Answer 2

B-(75-38)=27
b-37=27
b=37-27
b=64

(60-11)+c=90
49+c=90
c=90-49
c=49